import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;

class MyThreadPoolExecutor {
    private List<Thread> threadList = new ArrayList<>();
    //用于保存任务的队列
    private BlockingQueue<Runnable> queue = new ArrayBlockingQueue<>(100);

    //通过n指定创建多少个线程
    public MyThreadPoolExecutor(int n) {
        for (int i = 0; i < n; i++) {
            Thread t = new Thread(() -> {
                //线程要做的事就是不断从队列中取出任务，并执行
                while(true) {
                    //这里的take是带有阻塞功能的
                    //如果队列为空，直接阻塞
                    try {
                        Runnable runnable = queue.take();
                        //取出一个任务执行即可
                        runnable.run();
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }
                }
            });
            t.start();
            threadList.add(t);
        }
    }

    public void submit(Runnable runnable) throws InterruptedException {
        queue.put(runnable);
    }
}
public class TestDemo1 {
    public static void main(String[] args) throws InterruptedException {
        MyThreadPoolExecutor executor = new MyThreadPoolExecutor(3);
        for (int i = 0; i < 100; i++) {
            int n = i;
            executor.submit(new Runnable() {
                @Override
                public void run() {
                    System.out.println("执行任务" + n + "当前线程为" + Thread.currentThread().getName());
                }
            });
        }
    }
}
